View source for Heterosperma

{{Treatment/ID
|accepted_name=Heterosperma
|accepted_authority=Cavanilles
|publications={{Treatment/Publication
|title=Icon.
|place=3: 34. 1795
|year=1795
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Coreopsidinae;Heterosperma
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Coreopsidinae]]</div><div class="higher-taxon"><small>genus</small>[[Heterosperma]]</div></div>
|etymology=Greek, heteros, differing, and sperma, seed; probably alluding to the contrasting outer and inner cypselae
|volume=Volume 21
|mention_page=page 184
|treatment_page=page 218
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 10–40(–70+) cm (taprooted). <b>Stems</b> 1 (bases relatively thick), ascending to erect, branched distally or ± throughout (striate). <b>Leaves</b> mostly cauline; opposite; obscurely petiolate or sessile; blades mostly pinnately lobed [undivided] (lobes 3–5, usually linear to filiform, sometimes lanceolate), ultimate margins usually entire, sometimes denticulate (often ciliate, at least proximally, apices acute), faces glabrous [hairy]. <b>Heads</b> radiate, borne singly or in loose, cymiform arrays. <b>Calyculi</b> of (1–)3–5+ erect, narrowly spatulate or linear to filiform, herbaceous bractlets (often surpassing phyllaries, margins usually hispid-ciliate). <b>Involucres</b> cylindric to obconic, 2–5 mm diam. (larger in fruit). <b>Phyllaries</b> 3–5+ in ± 2 series, distinct, erect, mostly oblong or ovate, equal, membranous. <b>Receptacles</b> concave to flat, paleate; paleae similar to phyllaries, oblong or oval to lanceolate or linear (± embracing cypselae, ± hyaline with brown striae, apices obtuse, apiculate). <b>Ray</b> florets 1–3[–8], pistillate, fertile; corollas pale yellow [orange]. <b>Disc</b> florets 3–10[–20+], bisexual, fertile; corollas ± yellow (at least distally), tubes shorter than funnelform throats, lobes 5, deltate. <b>Cypselae</b> (± dimorphic) outer obcompressed, ellipsoid or obovoid, winged (wings ± corky, often cucullate and/or pectinate), faces often corky-tuberculate, glabrous, inner ± obovoid, usually some (innermost) tapered to ± barbellate beaks; pappi 0, or persistent or tardily falling, of (1–)2–3 spreading to reflexed, retrorsely barbellate awns. <b>x</b> = 25.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico;Central America;South America;introduced in West Indies.
|discussion=<p>Species 5–10 (1 in the flora).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Heterosperma
|author=Justin W. Allison
|authority=Cavanilles
|rank=genus
|parent rank=subtribe
|synonyms=
|basionyms=
|family=Asteraceae
|illustrator=Linny Heagy
|distribution=sw United States;Mexico;Central America;South America;introduced in West Indies.
|reference=None
|publication title=Icon.
|publication year=1795
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V21_531.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Coreopsidinae
|genus=Heterosperma
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae (tribe Heliantheae) subtribe Coreopsidinae]]